AirHint found the following cheapest one-way flights from Bangkok (BKK) to Riyadh (RUH) in September 2025 (see full year).

One-Way flights

25 Sep	Thai Lion Air
20 Sep	Thai Lion Air
11 Sep	Thai Lion Air
09 Sep	Thai Lion Air
10 Sep	Thai Lion Air
06 Sep	Thai Lion Air
07 Sep	Thai Lion Air
29 Sep	Thai VietJet Air
12 Sep	Thai VietJet Air
15 Sep	Thai VietJet Air

Also check the deals for return flights from Bangkok to Riyadh in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest one-way flights from Bangkok to Riyadh in September from 176€

One-Way flights